The Agilent/Keysight 85902A is a burst carrier trigger accessory that extends the measurement capabilities of 8590 and 8560 series spectrum analyzers. It delivers a TTL/CMOS timing reference derived directly from RF signals, enabling reliable triggering during transmitter characterization without external trigger circuits or invasive radio modifications. The integrated burst preamplifier covers 10 MHz to 2000 MHz with frequency-dependent gain (>18 dB at 10–350 MHz, >16 dB at 350–1000 MHz, >12 dB at 1000–2000 MHz) and a 60 dB input range, making it suitable for time-dependent power measurements, adjacent channel power assessment, and multi-format digital communication testing.
Technical Specifications
• Frequency Range: 10 MHz to 2000 MHz
• Burst Preamplifier Gain: >18 dB (10–350 MHz); >16 dB (350–1000 MHz); >12 dB (1000–2000 MHz)
• Input Dynamic Range: 60 dB
• Trigger Output: TTL/CMOS, BNC female
• Input Trigger Threshold: Adjustable via potentiometer
• Trigger Status Indicator: Red LED
• Power Supply: +15 Vdc at 100 mA; –12.6 Vdc at 40 mA
• Operating Temperature: 0 °C to +55 °C
• Storage Temperature: –40 °C to +75 °C
• Relative Humidity: Up to 95%
– Key Features
• Direct RF-to-trigger conversion eliminates external timing references
• Front-panel preamp input/output and RF input (all 50 Ω, BNC female)
• Rear-panel trigger output (TTL/CMOS, BNC female)
• Screwdriver-adjustable trigger threshold for signal-dependent sensitivity
• Compact form factor: 150 mm L × 80 mm W × 30 mm H
– Typical Applications
• Power-versus-time characterization in burst-mode transmitters
• Adjacent channel power ratio (ACPR) measurements
• TDMA, GSM, CDMA, and DECT signal analysis
– Compatibility & Integration
The 85902A integrates with Agilent 8590 and 8560 series spectrum analyzers and supports NADC-TDMA, E-TDMA, JDC, GSM, DCS-1800, CT2-CAI, DECT, PHP, and CDMA formats. This product is obsolete.
